Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden. It discloses key behavioral traits: it resets the hop chain and turn quota, restricts to thread members, and enforces a short cooldown. These go beyond the basic action and inform the agent of side effects and constraints, though it doesn't detail the return value or error scenarios.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise, with the core action front-loaded and each sentence adding unique information (behavior, permission, cooldown). No filler or redundancy; it earns its place efficiently.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple tool with two parameters and no output schema, the description covers the purpose, key behaviors, and constraints. However, it omits explanation of the 'token' parameter, which is not self-evident from the tool name or context. Additionally, it does not describe the return value or any side effects beyond the reset, leaving some gaps for an agent.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 0% and the description does not explain the 'token' parameter at all. It implicitly covers 'thread_id' by context (the thread being unfrozen), but provides no additional meaning for either parameter. Given the 0% coverage, the description fails to compensate for the lack of schema documentation.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific action ('Reopen a frozen thread') and resource, and adds clarifying details about what happens ('Resets the hop chain and the turn quota'), making the purpose unambiguous. It clearly differentiates itself from other thread-related tools like get_thread or remember_thread by its focus on unfreezing.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides clear context for when to use: for frozen threads, by thread members only, and mentions a cooldown after a freeze. However, it does not explicitly mention alternatives or when not to use it, so it lacks explicit exclusions or comparisons to sibling tools.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.